Survey operations 29 aug thru 01 nov by M/V akademik nemchinov and M/V akademik primakov towing 6500 meters…
Arctic Ocean · HYDROARC 176/23
What this record establishes
Archived notice · 2023-11-02 00:01Z
This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.
- Source and dates
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · NAVAREA XXI 39/23 211829Z AUG 23.. Issued 2023-08-21 18:55Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- Arctic Ocean. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
- issued
- 2023-08-21 18:55Z
- status
- Archived notice
- self-cancels
- 2023-11-02 00:01Z
- authority
- NAVAREA XXI 39/23 211829Z AUG 23.
- NAVAREA
- NAVAREA XXI · named as the source of this relay
- sea
- Arctic Ocean
- position
- 74.523, 171.923
- vessels
- M/V AKADEMIK NEMCHINOV · 26 messagesM/V AKADEMIK PRIMAKOV · 20 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EAST SIBERIAN SEA.
DNC 27.
1. SURVEY OPERATIONS 29 AUG THRU 01 NOV
BY M/V AKADEMIK NEMCHINOV AND
M/V AKADEMIK PRIMAKOV TOWING 6500 METERS
LONG CABLES IN AREAS BOUND BY:
A. 73-45.63N 174-27.26E, 73-26.42N 174-39.58E,
73-21.04N 172-59.62E, 73-39.91N 172-45.73E.
B. 74-44.10N 173-04.17E, 74-16.34N 172-54.80E,
74-18.71N 170-48.24E, 74-46.50N 170-53.89E.
SEVEN MILE BERTH REQUESTED.
2. CANCEL THIS MSG 020001Z NOV 23.
Reading this warning
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- Towed array / streamer
- Equipment towed a long way behind a vessel — sonar, a hydrophone cable, a sampling sled — invisible at the surface.
- Tow / towing
- A vessel towing another vessel, a barge or a structure — slow, hard to manoeuvre, and with a long line between.
- Area bound by
- Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
- Position (degrees and minutes)
- How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
- Date-time group (DTG)
- A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
Collected reports in this area · survey operations
7 within 180 nm since 2017 · 0 in the last 12 months · 0 listed in force now
Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.
- Underwater operations 30 sep thru 10 oct by M/V akademik nemchinov and M/V akademik primakov in area bound…2023-09-29
- Survey operations 28 aug until further notice by M/V geolog dmitriy nalivkin towing 8500 meter long cable in…2023-08-21
- Survey operations 28 aug until further notice by M/V geolog dmitriy nalivkin towing 8500 meter long cable in…2022-08-23
- Survey operations 21 aug thru 05 nov by M/V academic lazarev, M/V academic primakov, M/V professor logachev,…2021-08-17
- Survey operations 08 aug until further notice by M/V geolog dimitriy nalivkin towing 8000 meter long cable…2019-08-06
- Survey operations 29 aug thru 20 nov by M/V akademik lazarev towing 8100 meter long cable in area bound by:…2017-08-28
Month of issue in the collected archive
All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.
Nearby notices listed in force · within 120 nm
No other collected notice is currently listed in force within this radius. This does not establish safe conditions.
Worldwide in the collected sources
55 survey operations listed in force · see all
Record snapshot 2026-10-02 04:04Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.